[Date Time class and functions] #php #date #time #datetime #function #class

date-time-class-and-functions.php

<?php
// Patern http://userguide.icu-project.org/formatparse/datetime
// Patern http://www.unicode.org/reports/tr35/tr35-dates.html#Date_Field_Symbol_Table
$fmt = new IntlDateFormatter('lt_LT', IntlDateFormatter::FULL,
              IntlDateFormatter::NONE, 'Europe/Vilnius', IntlDateFormatter::GREGORIAN, "cccc");
$timestamp = strtotime('now');
$timestamp = strtotime('today');
$timestamp = strtotime('+7 days');
$timestamp = strtotime('next day');
echo datefmt_format( $fmt , time() );
$todays_weekday = mb_strtolower( $fmt->format($timestamp) );


$fmt = datefmt_create( 'lt_LT', IntlDateFormatter::FULL, IntlDateFormatter::NONE, 'Europe/Vilnius', IntlDateFormatter::GREGORIAN );
echo datefmt_format( $fmt , time() );


$fmt = datefmt_create( 'lt_LT', IntlDateFormatter::FULL, IntlDateFormatter::NONE, 'Europe/Vilnius', IntlDateFormatter::GREGORIAN, 'yyyy.MM.dd HH:mm' );
echo datefmt_format( $fmt , time() );
echo datefmt_format( $fmt , strtotime('next day') );


setlocale( LC_ALL, 'lt_LT.UTF-8', 'lt_LT', 'lt' );
$timestamp = strtotime('today');
echo strftime('%A', $timestamp);


$date = ( new DateTime( '+ 12 months' ) )->format( 'Y-m-d H:i:s' );
$date = ( new DateTime( 'last day of this months' ) )->format( 'Y-m-d H:i:s' );
$date = ( new DateTime( 'last day of this months + 6 months' ) )->format( 'Y-m-d H:i:s' );
$date = ( new DateTime( 'second Monday of October 2018' ) )->format( 'Y-m-d H:i:s' );
$date = ( new DateTime( '+ 1 day', new DateTimeZone( 'Europe/Vilnius' ) ) )->format( 'Y-m-d H:i:s' );
echo $date . '<br /><br />';
$date = ( new DateTime( 'now', new DateTimeZone( 'Europe/Vilnius' ) ) )->format( 'Y-m-d H:i:s' );
echo $date . '<br /><br />';
$date = ( new DateTime( '+ 3 minutes', new DateTimeZone( 'Europe/London' ) ) )->format( 'Y-m-d H:i:s' );
echo $date . '<br /><br />';

if ( ! function_exists( 'anwp_get_strtotime' ) ) {
	function anwp_get_strtotime( $date = null, $format = null, $timezone = null, $lang = null ) {
		// Patern http://userguide.icu-project.org/formatparse/datetime
		// Patern http://www.unicode.org/reports/tr35/tr35-dates.html#Date_Field_Symbol_Table
		/**********************************************************************
		 * ***
		 * 'yyyy-MM-dd HH:mm:ss' – 2019-11-03 04:13:41
		 * 'GGGG' – po Kristaus
		 * 'cccc' – sekmadienis
		 * 'zzzz' – Rytų Europos žiemos laikas
		 * 'VV' – Europe/Vilnius
		 * 'OOOO' – GMT+02:00
		 * "yyyy 'm.' MMMM 'mėn.' d 'd.'" – 2019 m. lapkričio mėn. 3 d.
		 * 'LLLL' – lapkritis
		 *********************************************************************/
		$date = ( is_null( $date ) ) ? 'now' : $date;
		$format = ( is_null( $format ) ) ? 'yyyy-MM-dd HH:mm:ss, cccc – VV OOOO' : $format;
		$timezone = ( is_null( $timezone ) ) ? 'Europe/Vilnius' : $timezone;
		$lang = ( is_null( $lang ) ) ? 'lt_LT' : $lang;

		$fmt = new IntlDateFormatter( "{$lang}", IntlDateFormatter::FULL, IntlDateFormatter::NONE, "{$timezone}", IntlDateFormatter::GREGORIAN, "{$format}" );

		$datetime = new DateTime( "{$date}", new DateTimeZone( "{$timezone}" ) );
		$fmt->setTimeZone( "{$timezone}" );

		return $fmt->format( $datetime );
	}
} // if ( ! function_exists( 'anwp_get_strtotime' ) )


if ( ! function_exists( 'anwp_get_x_days' ) ) {
	function anwp_get_x_days( $args = null ) {
		if ( is_null( $args ) || empty( $args ) || ! is_array( $args ) ) {
			$args = [
				'days'        => 7,
				'offset'      => 0,
				'direction'   => 'last', // available: last || next
				'format'      => 'yyyy-MM-dd',
				'timezone'    => 'Europe/Vilnius',
				'lang'        => 'lt_LT',
			];
		}

		$args['days'] = ( ! isset( $args['days'] ) ) ? 7 : $args['days'];
		if ( $args['days'] <= 0  ) {
			$args['days'] = 1;
		}

		$args['offset'] = ( ! isset( $args['offset'] ) || ! is_integer( $args['offset'] ) ) ? 0 : abs( $args['offset'] );
		$args['direction'] = ( ! isset( $args['direction'] ) || ! is_string( $args['direction'] ) ) ? 'last' : mb_strtolower( $args['direction'], 'UTF-8' );
		$args['format'] = ( ! isset( $args['format'] ) ) ? 'yyyy-MM-dd' : $args['format'];
		$args['timezone'] = ( ! isset( $args['timezone'] ) ) ? 'Europe/Vilnius' : $args['timezone'];
		$args['lang'] = ( ! isset( $args['lang'] ) ) ? 'lt_LT' : $args['lang'];

		// Patern http://userguide.icu-project.org/formatparse/datetime
		// Patern http://www.unicode.org/reports/tr35/tr35-dates.html#Date_Field_Symbol_Table
		/**********************************************************************
		 * ***
		 * 'yyyy-MM-dd HH:mm:ss' – 2019-11-03 04:13:41
		 * 'GGGG' – po Kristaus
		 * 'cccc' – sekmadienis
		 * 'zzzz' – Rytų Europos žiemos laikas
		 * 'VV' – Europe/Vilnius
		 * 'OOOO' – GMT+02:00
		 * "yyyy 'm.' MMMM 'mėn'. d 'd.'" – 2019 m. lapkričio mėn. 3 d.
		 * 'LLLL' – lapkritis
		 *********************************************************************/
		$fmt = new IntlDateFormatter( "{$args['lang']}", IntlDateFormatter::FULL, IntlDateFormatter::NONE, "{$args['timezone']}", IntlDateFormatter::GREGORIAN, "{$args['format']}" );

		$date_array = [];
		$datetime = new DateTime( 'now', new DateTimeZone( "{$args['timezone']}" ) );

		if ( $args['offset'] !== 0 && $args['direction'] === 'next' ) {
			$datetime->modify( "+{$args['offset']} day" );
		} else if ( $args['offset'] !== 0 && $args['direction'] === 'last' ) {
			$datetime->modify( "-{$args['offset']} day" );
		}

		for ( $i = 0; $i < $args['days']; $i++ ) {
			$date_array[] = $fmt->format( $datetime );

			if ( $args['direction'] === 'last' ) {
				$datetime->modify( '-1 day' );
			} else {
				$datetime->modify( '+1 day' );
			}
		}

		// return array_reverse( $date_array );
		return $date_array; // funkcijose tik vienas veiksmas, reikalui esant, gautą rezultatą bus galima apversti
	}
} // if ( ! function_exists( 'anwp_get_x_days' ) )